DPR is worthy of detailed study because it represents an important exemplar of text retrieval using learned dense representations, which has recently emerged as a promising alternative to “traditional” text retrieval using sparse bag-of-words representations [1]}, [2]}, [3]}, [4]}.
Our experiments largely verify the claims of [5]} regarding the effectiveness of their proposed techniques.
However, we arrived at two important additional findings, one of which is inconsistent with the original work, the other of which presents an enhancement:
